A degenerate Fermi gas of polar molecules
A degenerate Fermi gas of polar molecules
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DOI：
10.1126/science.aau7230
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发表时间：
2019-02-22
期刊：
影响因子：
56.9
通讯作者：
Ye, Jun
中科院分区：
文献类型：
--
作者：
De Marco, Luigi;Valtolina, Giacomo;Ye, Jun
量子简并气体分子的实验实现将提供进入分子和量子科学中的广泛现象。然而，正是超冷分子的复杂性使得简并性在过去十年中成为一个突出的实验挑战。我们现在报道超冷极性钾铷分子简并费米气体的产生。通过相干绝热关联的铷玻色-爱因斯坦凝聚体和钾费米气体的深度简并混合物中，我们产生的分子温度低于0.3倍的费米温度。我们探索这种反应性气体的性质，并演示如何简并抑制化学反应，使长寿命的退化气体的极性分子成为现实。
Experimental realization of a quantum degenerate gas of molecules would provide access to a wide range of phenomena in molecular and quantum sciences. However, the very complexity that makes ultracold molecules so enticing has made reaching degeneracy an outstanding experimental challenge over the past decade. We now report the production of a degenerate Fermi gas of ultracold polar molecules of potassium-rubidium. Through coherent adiabatic association in a deeply degenerate mixture of a rubidium Bose-Einstein condensate and a potassium Fermi gas, we produce molecules at temperatures below 0.3 times the Fermi temperature. We explore the properties of this reactive gas and demonstrate how degeneracy suppresses chemical reactions, making a long-lived degenerate gas of polar molecules a reality.